Here it is, our room with a blue. It's the bedroom, and it's a fairly intense color, but I'm really happy with the way it looks. Once all the stuff is in it, I think it will work very well.
Here's the office; kind of a pale grey-blue. Dave picked up this paint for us as a mistint, which is fantastic and cheap.
The only real problem with the blue paint in the bedroom is that it makes the wall-installed air conditioner stick out crazily. I painted the cord blue in an effort of camouflage, but it doesn't help much.